1.如果用during which的话,更强调在那期间做了些什么,比如,during which, he also went to 某地等等。但现在强调的是在那期间,仅仅是sailing救用了226天,所以是用A。 the sailing time of the journey was 226 days,而其中的the journey应该用which 来代替2.B强调在那期间做了些什么,
不同意楼上,第一题就选during which
during which